Smoking pipe and method of making same



April l0, X945. v y J. A. DONNELLY SMOKING PIPE AND METHOD OF MKING SAME Filed Aug. 25, 1943 Patented Apr.. 10, 1945 I UNITED STATE sMoxrNG Pira AND Me'rnon oF Mama sama y James A. Donnelly, Largent, W. Va.

Application August 25, 1943, Serial No. 499,981

9 Claims.

(Cl. ISI-207) This invention relates to an improved smoking l pipe' and a method of making the same.

The invention has for one of its objects the provision of a pipe structure which will improve the combustion of tobacco and conduct such combustion more in conformity with natural laws than has heretofore been done; so as to produce a. more agreeable and beneilcial result when .used by a smoker.

A further object of the invention is the provision of a preconditioned structure which will obviate the necessity o! the usual breaking-in process and which will remain sweet and clean and substantially free ofthe usually obnoxious moisture conditions which ordinarily obtain.

Another object of the invention is the provision of a pipe which in its original condition and throughout its period of use will substantially adsorb the poisonous gases and nicotine attendant in the process of smoking tobacco, and which will require little cleaning.

Other objects of the invention include the production of-a pipe having a composite lining of highly refractory. non-absorbent material of high density and hardness, and one having combined therewith activated carbon of tobacco.

'I'he foregoing and other objects of the inven` tion are accomplished by a pipe constructed by a method in which the pipe bowl is lined with a highly refractory lining of carborundurn or the like and has also therein activated carbon of tobacco. The structure and method will be more clearly understood from the following detailed description of the invention and by reference to the drawing forming a part of the speciilcation, wherein- Figure l is a longitudinal cross sectional view showing one embodiment of the invention.

Fig. 2 is a detail view of the stem and adsorbing lter removed from the pipe.

Fig. 3 is a longitudinal section of a modified adapted to receive and retain therein a small quantity of carbonized tobacco.

The stummel and stem of the pipe are so` constructed and designed as to give the utmost protection to the smoker against poisonous gases -and the normally disagreeable accumulation of moisture and, in conjunction with the bowl construction, eectively eliminates highly disagreeable tastes and odors. The bore or vent through mounted at one end on a reduced end portion I form of pipe in accordance with the invention.

Fig. 4 is a detail view in rear elevation of the .removable carbon element of Fig. 3.

of the stern; The other end of the tube Iextends into the bowl of the pipe preferably pastthe vertical axis of the bowl boring and carries at `its free end a solid mass metal insert 8 which is adapted to store heat for a purpose presently to be described. The tube is closed except for a smoke aperture 9 adjacent the metal insert, and carries therewithin a charge of carbdnized tobacco I3 or other activated carbon. The smoke receiving aperture in the normal assembly ofthe parts falls substantially in the center of the bowl. By turning the stem 180, the smoke' receiving aperture may function at different levels in the bowlfto vary the heating of the tube and the fixed activated carbon in4 the pipe.

In making the pipe, the bowl is provided with a bore which will dene the recess below the side smoke vent. and the stummel portion is provided with an enlarged bore which intersects the -bore of the bowl. The bowl is then lined with a highly refractory, non-absorbent material I0 of high density and hardness such as carborundum. 'Ihe carborundum with a suitable binder is applied to the bowl in a moist plastic. condition and while in such condition and before setting there is embedded in the surface of the liner at the bottom of the bowl a covering of relatively coarse pieces of carbonized tobacco, and on the inside surface of the upper part of the bowl there is applied a thin coating of carbonized dust of tobacco. This treatment or preconditioning of the bowl provides a condition of the pipe best suited tov proper smoking from the very start of theuse of a new pipe so as to obviate the necessity of the usual disagreeable breaking-inprocess. y

The carborundum lining protects the briar of the pipe, maintains proper size of bore in cleaning operations, and provides combustion aid and more even distribution of re. 'I'he activated carbon of tobacco contributes its additional adsorptive. characteristicsffor treatment and elimisame manner and by the same method as here-J inbefore described, except that in lieu of embeddinginthebottanofthebowliixedcoarse portions of activated carbon, there is employed adetachable insert Il. The insert is formed preferably of activated carbon of tobacco and is made as a replaceable imit in such manner as to closely it the inner lining of the bowl. The

obtained and combustion is more easily susmined. t A

It will be obvious to those skilled in the srt that the removable insert is calculated to be one of several designs dependent upon the shape and contour of the vbowl structures with which it is employed. It is to be noted that when the insert is lin position in the bottom of the bowl the side recess therein isy placed in registry with the bore through the stummel so thatwhen the stem and its attached tubular extension is inserted insert as more particularly shown in Figs.l 4 and l5 has a spherical surface to correspond with the bowl lining and a ilat upper surface which constitutes tbe'bottom oi the bowl with respect to' the smoking charge when the insert is in position. The insert or detachable unit is a porous structure constructed by molding in the presence of a binder particles of activated carbon. It is so characterized that smoke and gases may pass from the tobacco in the bowl through the insert to the tubular member and the stem of the pipe. The insert is further characterized by a, lateral recess or depression l2 which extends transversely of the unit to receive therein `the ymetal tube which extends `from the stem through the stummel into the'bowl of the pipe. The end of this metal tube extends to substantially a central portion of the bowl and into the lateral re cess of the unit. It will be seen by this construction that by removing thestem and its tubular .attachment the bowl insert may be freed for removal from the bowl and for the substitution of a new insert. 'I'he insert is intended as a. re`

Aplaceable unit so will oi a user.

The gases from the tobacco have dual treatment inthe insert and the tubular attachment of the stem. The ymaterial being activated carlbon, it `is iniluenced by the heat incident to that renewal is possible at 'the smoking so that it is subject to reactivation and to drying so as to' preclude the accumulation of moisture.

In the structures hereinbetore described combustion is aided by the. presence of the activated carbon and carborundum 'lining of the bowl.

This gives even distribution of ilre around the Ibowl and avoids side lighting which is such a common defect in sonne pipe constructions. It

.is 4unnecessary to set forth `the theory Ibut it has been .found that pipe structures made as herejinbefore described remain substantially free of disturbing moisture collections and obnoxious odors.

vantages thereinare ltrue in all `general uses with Aall forms of tobacco. While not forming a part of this invention,'it has been found through the :stummel the end of the tubular attachment provides a locking engagement with the ,insert so that it cannot be` dislodged from its position in the bottom of the bowl.

The invention 4has been described in connection with preferred embodiments thereof but the words used in rsetting forth the illustrations are to be considered as 'words of description and not those of limitations, and the invention contem- A plates all improvements within the scope of. the

appended claims.

I claim:

l. A smoking pipe of the character described comprising a Amain body portion having a bowl and a transverse stem aperture substantially the same diameter throughout its length, the bottom of 'said bowl dening a substantial recess below thestem aperture, a lining of carborundum coated with activated carbon o! tobacco molded in said bowl, afstem frictionaliy engaged in the stem aperture. and iin-activated carbon lter on said stem extending vinto .the bowl of the pipe for conducting and treating gases passing through the 2.v In a smoking pipe o! the character described, a main body poruon having a. bowl and a. communicating stem bore of even diameter throughout its length, said bowl having a substantial recess below the stem-bore, a non-absement .refractory lining of high density and4 hardness having a surface coating of activated carbon yof tobacco, an activated carbon deposit in -the bottom vof the bowl, a stem frictionally engaged within the stem bore, and s, non-corrosive tubular illter member containing activated carbon vdetachably mounted at one end on said stem and having vits other end apertured and extending .into the bowl.

vvthat theutmost advantage, and that of an added nature, is obtained by the .use of a. tobaccc'mixv ture consisting of ordinary tobacco and a predetermined percentage oi carbonized tobacco. The carbonized tobacco assists in maintaining combustion .and in driving off the volatiles from the uncarboniaed tobacco. Furthermore, it appears to have a peculiar cooperation with the pipe 3. A Vpipe as dened in claim 2 characterized `by having a. solid 4metal heat retentive member 'at the bowl end oi the tubular iilter member.

4. 'In a smoking pipe of vthe character described, a main body portion having a transverse stem bore of even diameter throughout its length lto .receive a stem and illter assembly, a stem a portion tting within said bore and a; forwardly extending reduced annular portion, a tubular lfer attachment detachablymounted at one end on the reduced portion of the stem and extending through the stem bore-and transversely of the bowl of the pipe. a charge of activated carbon within the attachment for contacting Bases 'passing 'to the stem of the pipe, and a removable porous activated carbon insert positioned in the bottom of the bowl in locking engagement with the tubularA extension from the stern.

5. Apipe structure as dened in claim 1 char-r acterized by vhaving a, xed deposit of activated carbon of tobacco in the bottom of the bowl below the stem aperture. A

6. A `smoke filtering pipe bowl insert of the character described, comprising a molded porous `structures described in that easier lighting .is 15 body orv activated carbon and a binder adapted to flt the-bottom of the bowl of a pipe andv having a transverse recess in the side thereof for gases passing through the insert and for locking engagement with a portion of the pipe.

7. A molded porous pipe bowl insert of acti- 5 vated carbon and a binder, said insert being of suflcient thickness to extend above the stem bore of a pipe and having a side smoke conducting recess therein to receive a locking extension from the stem of a pipe and being further char- 10 acterized by having one surface thereof contoured` to nt the bottom of a pipe-bowl and another surface thereof adapted to define the bottom of a pipe bowl above the stem bore when the insert is in DOsition in the pipe.

.v lo 8. 'I'he method of making a smoking pipe which comprises providing the bowl portion of the pipeI with a relatively large transverse stem bore of even diameter throughout its length, providing a low said transverse bore. forming on the interior of the bowl of the pipe a carborundum lining Isubstantial recess in the bottom of the bowl be- 20 coated with activated carbon of tobacco, and embedding in the bottom of the bowl of the pipe a nxed amount of coarse particles of activated carbon of tobacco.

" 9. In apipe of the character described, a main body or bowl portion having a non-absorbent dense lining of carbonaceous material 'with an bottoni of the bowl in locking engagement with the filter attachment'. said insert being removable from the bowl on removal of the stem and filter attachment.

. JAMES A. DONNELLY. 

